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An Epidemiological and Genetic Study on Registered Diseases in Finnish Ayrshire Cattle

En epidemiologisk och genetisk undersökning au sjukdomsdata från finsk Ayrshire boskap. II. Reproduktionstörningar

II. Reproductive Disorders

Acta Veterinaria Scandinavica volume 27, pages 196–208 (1986)Cite this article

Abstract

The epidemiology and genetic variability of the most common reproductive diseases were examined. The data set consisted of the lactation records of 70,775 Finnish Ayrshire dairy cows. Each cow was under observation for 2 days before for 305 days after calving. Lactation incidence rates (%) were: dystocia (DYST) 0.9, retained placenta (RTPL) 4.5, metritis (METR) 2.3, anoestrus and suboe&trus (ESTR) 5.2, and ovulatory dysfunction (CYST) 7.0. These diseases formed 33 % of all first treatmetns by veterinarians during farm visits. The occurrence of DYST, RTPL and METR was lowest in parity 2. ESTR decreased and CYST increased with parity. Cows calving during the dark season (September-February) had a higher risk of ESTR, METR and CYST (odds ratios (OR) 2.2–1.1) and a lower risk of RTPL (OR 0.9) than those calving during the light season (March-August). The increase in herd milk yield was positively associated with the occurrence of reproductive disorders. The cows with a history of parturient paresis had a higher risk of contracting CYST, RTPL and METR (OR 6.6–1.8), the cows with retained placenta of contracting metritis (OR 5.1), the cows with metritis of contracting ESTR and CYST (OR 1.5–1.7), the cows with mastitis of contracting METR and ESTR (OR 2.0–1.3) and the cows with ketosis of contracting METR, ESTR and CYST (OR 2.7–1.6). Heretabilities were determined for 5 diseases and for infertility in general. Heritability estimates for parity 2 were: DYST 2 %, RTPL 3 %, METR 7 %, ESTR 12 %, CYST 12 %, and infertility in general 5 %. Heritability for calving interval was 5 % in parity 1 and 6 % in parity 2.

Sammanfattning

Epidemiologin och den genetiska variationen av de mest allmänna reproduktionsjukdomarna har undersökts. Dataset innehöll laktations-resultaten från 70775 finska Ayrshire kor. Varje ko observerades från 2 dagar före till 305 dagar efter kalvningen. Laktation incidence rate (%) var: förlossningshjälp (DYST) 0,9, kvarbliven efterhörd (RTPL) 4,5, metrit (METR) 2,3, anoestrus och suboestrus (ESTR) 5,2 och ovulatoriska störningar (CYST) 5,2. Dessa sjukdomar omfattar 33 % av alla första veterinärbehandlingar på gårdarna. Förekomsten av DYST, RTPL och METR var lägst under den andra laktaitionen. ESTR minskade och GYST ökade med antalet laktationsperioder. Kor som kalvade under det mörka halvåret (september-februari) hade en högre risk att insjukna i ESTR, METR och GYST (odds ratio (OR 2,2—1,1) och en lägre risk att insjukna i RTPL (OR 0,9) än kor som kalvade under det ljusare halvåret (mars-augusti). Besättningens mjölkproduktion hade ett positivt samband med förekomsten av reproduktionsjukdomar. Förekomsten av vissa andra sjukdomar under samma laktation stod i samband med en högre risk för reprodiuktionsjukdomar: puerperal pares med DYST, RTPL och METR (OR 6,6—1,8), kvarbliven efterhörd med METR (OR 5,1), metrit med ESTR och GYST (OR 1,5—1,7), mastit med METR och ESTR (OR 2,0—1,3) och ketos med METR, ESTR och GYST (OR 2,7—1,6). Ärftligheten för 5 enstaka sjukdomar och för infertilitet som sjukdomsgrupp kalkyderades. Ärftligheten i den andra laktationsperioden var följande: DYST 2 %, RTPL 3 %, METR 7 %, ESTR 12 %, GYST 12 % och infertilitet 5 %. Ärftligheten för kalvningsintervall var 5 % (laktation 1) och 6 % (laktation 2).

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Acknowledgment

The authors thank Pol. Lie. Juni Palmgren for advice on logistic regression, and the Agricultural Data Processing Centre for supplying computer facilities for statistical analysis.

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Authors and Affiliations

  1. Department of Animal Hygiene, College of Veterinary Medicine, Helsinki, Finland

    Hannu Saloniemi, Yrjö Gröhn & Jouku Syväjärvi

  2. the Finnish Animal Breeding Association, Vantaa, Finland

    Hannu Saloniemi, Yrjö Gröhn & Jouku Syväjärvi

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  1. Hannu Saloniemi
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  2. Yrjö Gröhn
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  3. Jouku Syväjärvi
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Saloniemi, H., Gröhn, Y. & Syväjärvi, J. An Epidemiological and Genetic Study on Registered Diseases in Finnish Ayrshire Cattle. Acta Vet Scand 27, 196–208 (1986). https://doi.org/10.1186/BF03548164

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Acta Veterinaria Scandinavica

ISSN: 1751-0147